Cash register



E. BREITLING CASH REGISTER Aug. 19, 1941.

Filed April 21, 1959 3 Sheets-Sheet l Ernst Brcitling Inventor y M M His Attornev E. BREITLING CASH REGISTER "Filed April ifiess 3 Sheets-Sheet 2 Ernst Breitling Inventor His Attorney Au 19, 1941. E, TLIN 2;253,226

CASH REGISTER Filed April '21, 1939 3 Sheets-Sheet 5 yx: /22 I 2 /Z8 w [95 I Efnst Breitljng Inventor His Attorney Patented Aug. 19, 1941 CASH REGISTER Ernst Breitling, Berlin-Tempelhof, Germany, assignor to The National Cash Register Company, Dayton, Ohio, a corporation of Maryland Application April 21, 1939, Serial No. 269,297 In Germany April 27, 1938 2 Claims.

This invention relates to improvements in differential mechanisms of the type used in cash registers and accounting machines, and particularly to differential mechanisms employed for setting up data to be recorded during adding operations and for printing the highest order digits of a total during total-taking operations.

The object of the invention is to provide a differential mechanism of the type in which two actuators are provided, one of which is provided to set up data during adding operations and the other of which is provided to set up the highest order digits of a total during total-taking operations, with a novel latch mechanism.

With these and incidental objects in view, the invention includes certain novel features of construction and combinations of parts, the essential elements of which are set forth in appended claims and a preferred form or embodiment of which is hereinafter described with reference to the drawings which accompany and form a part of this specification. Of said drawings:

Fig. 1 is a sectional side view of the differential mechanism.

Figs. 2 and 3 are details of the mechanism W taking control means and a part of the machine I release means.

Fig. 8 shows part of an amount bank and the means for preventing operation of amount keys during total taking.

Special difierentials The differential mechanism comprising the present machine has been applied to a machine wherein one or more banks of keys are used for setting up data. These banks of keys are conveniently arranged to the left of the amount entering keys, such as the amount key 28! shown in Fig. 1 of the United States patent to Ernst Breitling, No. 2,052,444, issued August 25, 1936.

The special differential disclosedherein is used during add operations of the machine for data which are not entered into a totalizer. Since the differentials are located to the left of the amount entering banks of keys, they may be located opposite overflow wheels of the totalizer, and controls are provided whereby the differentials can be utilized for setting up amounts standing on the overflow wheels of the totalizer. By this arrangement, the size of the keyboard need not be increased nor the totalizer capacity reduced. A similar arrangement is shown and described in the United States patent to Robertson, No. 1,929,652.

The differential (Fig. 1), facing the two righthand totalizer orders and cooperating with quantity keys I I in amount entering, must not transmit their setting to adding wheels 2| of these two right-hand totalizer orders, but must zeroize the adding wheels of these orders in total taking. To obtain this result, the differentials of these orders are provided with a main differential member Ma and an auxiliary differential member 4!!) (Figs. 1, 2 and 3). On a pin 42 of the auxiliary member Mb a pawl 43 is mounted. Said pawl 43 has a pin 45 which, by the action of a spring 44 tensioned between the pawl 43 and the auxiliary member 4"), bears against a lug of a lever 46 pivoted on a stud 41, which also supports a zero stop pawl 48 of said key bank. The lever 46 engages a pin 49 of a lever 50 mounted on a shaft 200. The shaft 200 is retained in its initial position during all adding operations, but is rocked counter-clockwise to and fro by the machine drive in all total taking operations by means hereinafter described. As long as the machine is set to adding, the lever 50 and the lever 46 remain in the positions shown in Fig. 1, whereby a clockwise rotation of the pawl 43 due to the action of the spring 44 is prevented.

The special differentials (Fig. 3) also include the coupling pawl 82, setting member 83, and actuator 80, the latter being connected by a link 86 to the arm 81 (Fig. 1) mounted on the rod 88 and guided by the block 89 on the shaft 90. The spring H2 (see also Figs. 2 and 3) connects the main member Ma and the setting member 83, and the pawl 82 and its pin I06 couple the actuator to the member Ma. The cams and 96, through the levers 9i and arms 81, operate the rod 88 and link 86 to drive the actuator 80 first clockwise and then counterclockwise to their original positions. The actuator 80, through the stud ill, restores the parts 4la, 41b, and 83 to their normal positions-at the proper time.

Upon depressing a quantity key II, a detent 5| allotted thereto is shifted upwardly and a pin 52 on said detent 5| rocks the zero stop pawl 48 and moves its pin 53 out of the path of the setting member 4la. Now, upon actuation of the machine, the differential member M11 is rocked by its actuator 83 until said member is arrested by the stern of the quantity key depressed, and the associated type wheel is set accordingly in a manner described below. The auxiliary diiiferential member 4Ib remains in its initial position, as it is not coupled with the member 4Ia, as the lug of the lever 46 is located in front of the pin 45 of the pawl 43 and prevents any undesired movement of the auxiliary member 41b. Consequently the quantities set up by the quantity keys II depressed, are not entered into the totalizers.

Totalizcr The totalizer illustrated herein is a totalizer of the general type illustrated in the abovenamed Breitling patent. Only the overflow wheels of such a totalizer are illustrated herein.

The overflow wheels 2| (Fig. 1), mounted on shaft 23, control the difierential setting of the diiferential mechanism during total-taking operations.

During adding operations, when the highest order totalizer wheel passes from 9 to 0, the tens transfer mechanism adds one into the first overflow wheel 2I When the first overflow wheel passes from 9 to 0, due to repeated tens transfers therein, a tens transfer disk 24, connected to the overflow totalizer wheel 2I, trips a tens transfer mechanism (not shown) to cause 1 to be entered into the next higher order overflow wheel, through the medium of a transfer segment 3I.

The overflow wheels 2| are connected with the diiferential mechanism through gears 22 and 35, the totalizer wheels 2I being rocked into engagement with gear 22 at the proper time by mechanism not shown herein. The gear 35 (see also Fig. 2) is always in mesh with the auxiliary member 4Ib, the former being mounted on a nest of sleeves on shaft 43.

Certain elements of the tens transfer mechanism, such as shafts 23 and 28, stud 32, arm 33, and disk 38, are shown herein, but not described, since an understanding of the exact form of transfer mechanism shown herein is not necessary to a clear understanding of the present invention, since any form of transfer mechanism will operate equally successfully with the present invention.

Total taking For total taking, the shaft 206 is rocked counter-clockwise (Figs. 1 and 5) through a certain angle, as will be hereinafter described in connection with the machine releasing means. The two levers 56, one for each bank of quantity keys. are secured to the shaft 200 and rotate their associated levers 46 clockwise and release the pawls 43 to follow under action of their springs 44. Also. by means of pins 54 on the zero stop pawls 48, the latter are rotated clockwise, whereby the pins 53 of the zero stop pawls are moved out of the paths of the differential member He. The springs 44 rock the pawls 43 so far that their lower working surfaces bear on a lug 55 secured to each of the members He, thus connecting the members Ma and HI). Upon operation of the machine, the driven differential member 4Ia carries along the auxiliary differential member 4Ib coupled therewith, which rotates the engaged adding wheel 2I counterclockwise until a projection of the tens transfer disc 24 engages a tooth of the tens carrying pinion 3I and stops it in its zero position. Thus,

the differential members MI) and Ma are stopped in a position corresponding to the amount taken from the respective adding wheel, and such amount is transmitted to the type wheel in a manner to be specified immediately.

During the return movement of the diiferential member 4Ia, the auxiliary differential member 4Ib associated therewith is positively returned into its initial position by a pin 56 of the auxiliary member 4Ib being engaged by the member 4Ia. Upon the return of the shaft 200, the members Ma and MD are disengaged and all the parts are again in their initial positions according to Fig. 1.

Machine releasing means The machine releasing mechanism will be described only in connection with total taking operations. For a full description of all releasing means and controls therefor, reference may be had to the Breitling, Topel, and Philipp application, Serial No. 238,546, filed November 3, 1938.

Connected to the motor bar I9 (Fig. 6) is a plate I2I having a pin I23 cooperating with a lever I24 pivoted on a stationary stud I25 and connected by a link I26 to an arm I21 mounted on a shaft I22. The arm I21 is connected to a bail I28 (Fig. 4) loose on the shaft I22 but connected to a tube I23. The bail I23 is connected to an arm I32 loose on a shaft I26, by a link I3I. A spring I33 (Fig. 6) tends to keep the motor bar IS in its normal position.

A stud I35 (Fig. i) of a slide I36 bears against the lever I32. This slide I36 is pivoted to a lever I31 and is guided on a rod I33. The lever I31 is pivoted on a stud I40 of a slide I4I of the transaction bank of keys I5 and is held in its upper position by a spring I42.

Joined to the lever I31 is a link I44 connected to an arm I45. A lever I46 is adapted to be moved into the position shown in Fig. 4 by the depression of any of the keys I4 to I1 to arrest or prevent movement of the arm I upon depression of the motor bar I9, so that the machine will be released during total taking operations when one of the control keys I4 to I1 is operated.

Depression of the motor bar I9 rocks the lever I32 counter-clockwise and, as the arm I31 cannot rock on its pivot stud I43, due to the arm I46 being in the path of arm I45, said arm I31 pivots on the link I44 and the stud I40 carries the slide I4-I against the action of the spring I42.

A pin I6I of the slide MI is embraced by a forked lever I62 pivoted on a stationary stud I65. The lever I62 is secured to a pawl I63, a hook I64 of which normally lies beneath a lug I66 of a slide I61 of the bank of keys I5. A spring I68 tends to pull the slide I61 down, but is prevented from doing so by the hook I64.

However, when the slide MI is lowered, as above described, upon operation of the control keys, the pin IBI' rocks the pawl I63 and releases the slide I61 to the action of the spring I66.

A link I1I- (Figs. 4 and 7) connects the slide I61 to an arm I12 secured to a tube I 13 connected to a release bail I16 loose on the shaft 266. An arm I14 of the bail I14 carries a stud for a block I15 pivoted thereon. The block I15 slides in a slot ofv a lever I16 pivoted on a stationary stud I11. A spring I13 tends to'rock the lever I16 clockwise, thus tending to aid the spring I68.

An arm I86 (Figs. 4 and 7) of a two-armed lever is loose on the shaft 260 and bears on an arm I19 of, the lever I13. Another arm I8I of said two-armed lever faces a node I69 of said lever I16.

A link I83 is pivoted on a stud I68 of the arm I88 and connects said arm I88 to a machine locking lever I84 pivoted on a stationary stud I85. Normally, one arm of the lever lies under a plate I88 secured to a gear I81 fast on the drive shaft 92. A roller I89 attached to the gear I81 cooperates with an arm I88 of the lever I84, and a spring-drawn arm I9I bears on said arm I86.

When the motor bar I9 (Fig. 6) is depressed and the slide I81 (Fig. 4) is pulled down by the spring I68 when a control key I5 is depressed as above described, the spring I68, aided by the spring I18, rocks the bail I18 and lever I16 clockwise. Thus the arm I19 releases the arm I88 to the action of the spring I82, whereupon the lever I84 is withdrawn from the plate I 88 and the arm I9I rides off the arm I88 to close a motor circuit, and the shaft 92 is then given one counterclockwise rotation.

Secured to the shaft 288 (Figs. 4, 5, and 1) is an arm I98 held against the stud I68 by a spring I99. In addition to the above-mentioned levers 58 for the quantity banks, there is also secured to the shaft 288 a lever I95 (Figs. '7 and 8) for each amount bank of keys I8. Each lever I95 cooperates with a pin I94 of its associated zero stop pawl I83 to rock the latter and remove its pin I85 away from the differential members 4I during total taking operations.

Therefore, when the stud I68 (Figs. 4, 5, and 7) is raised upon release of the machine, as above described, the spring I99 rocks the shaft 288 counter-clockwise (Figs. 4 and 5) and clockwise as viewed in Fig. 8, whereupon the levers I95 rock the amount zero stop pawls I83 to release the diiferential members 4I associated with the amount banks of keys I8, and the levers 58 (Fig. 1) rock the quantity zero stop pawls 48 to release the differential members 4| a so that all differentials can be controlled by their associated adding wheels 2| to adjust any desired recording medium to amounts representing the totals taken from said wheels.

During adding operations, the shaft 288 cannot be rocked by the spring I99, even though the stud I88 is raised upon release of the machine, as depression of any amount key I8 (Fig. 8) moves a flange I91 in front of a hook I96 on the lever I95, and moreover, depression of any key II moves a flange I93 (Fig. 1) of its respective detent 5| in front of a hook I92 of its associated lever 58.

During total taking operations, said hooks I96 and I92 are moved over the tops of their respective flanges I91 and I93 when the shaft 280 is rocked as above described, thus preventing operation of any of the keys I 8 or II during total taking operations.

At the end of the operation, the roller I89 (Fig. 4) restores the lever I84 to normal position, whereupon the link I83 restores the arm I98 and the stud I68 restores the arm I98, shaft 288, and levers I95 and 58 to their normal positions.

While the form of mechanism herein shown and described is admirably adapted to fulfill the objects primarily stated, it is to be understood that it is not intended to confine the invention to the one form or embodiment herein disclosed, for it is susceptible of embodiment in various forms, all coming within the scope of the claims which follow.

What is claimed is:

1. In a differential mechanism of the class described, the combination of a driving member; two driven members, one of said driven members being differentially settable from a normal home position into a differentially set position by said driving member at each operation thereof; a projection on said one driven member; a pawl pivoted on the other one of said driven members; a. working surface on one end of the pawl; a resilient means normally urging the pawl into a position wherein the working surface of the pawl coacts with the projection on said one driven member, said pawl being pivoted on said one driven member in such a position that the working surface of the pawl always tends to move in a direction away from a point about which said driven members pivot; an element normally engaging the pawl to restrain the pawl in a position wherein the working surface thereof is disengaged from the projection on said one driven member; a control means coacting with the element to withdraw the element from engagement with the pawl to release the pawl to the action of the resilient means whereby the resilient means moves the working surface of the pawl into the path of the projection on said one riven member, whereby the differential move ment of said one driven member can be transmitted to said other driven member when the said one driven member is moved out of its home position; and means on said other driven member engageable by the said one driven member to restore the said other driven member to its home position when said one driven member is moved back to its home position.

2. In a differential mechanism of the class described, the combination of a driving member; two driven members, one of said driven members being differentially actuated from home position to a differentially set position by the driving member at each operation thereof; a clutch member pivotally mounted on the other one of said driven members and intermediate the two driven members whereby the differential actuation of said one driven member may be transmitted to said other one of said driven members, said clutch member being normally in an ineffective position; resilient means normally urging said clutch member toward effective position; means normally engaging said clutch member to hold the clutch member in ineffective position; control means for withdrawing said clutch member holding means to permit said resilient means to move said clutch member to eifective clutching position, the clutch member being pivoted to move away from the center of movement of the two driven members when moved into effective position by the resilient means; and means on said second driven member coacting with the first driven member to connect the driven members for unitary movement in a direction back to home position.

ERNST BREITLING. 

